Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Nomeie a data da nomeação para petrik sander.
 ###Tabelas: CREATE TABLE filmfare_awards (filmfare_awards_id AUTO_INCREMENT PRIMARY KEY, Year INT, Song VARCHAR, Film VARCHAR, Music director(s) VARCHAR, Lyricist VARCHAR) CREATE TABLE managerial_changes (managerial_changes_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Outgoing manager VARCHAR, Manner of departure VARCHAR, Date of vacancy VARCHAR, Replaced by VARCHAR, Date of appointment VARCHAR, Position in table VARCHAR) CREATE TABLE notes_and_references (notes_and_references_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, Location VARCHAR, Total INT, Crimean War INT, Persian War INT, Indian Mutiny INT, 1860-1878 INT, Zulu War INT, Second Afghan War VARCHAR) CREATE TABLE georgia_counties_ranked_by_per_capita_income (georgia_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE the_2012_season (the_2012_season_id AUTO_INCREMENT PRIMARY KEY, Position INT, Driver / Passenger VARCHAR, Equipment VARCHAR, Bike No INT, Points INT)  
SELECT Date of appointment FROM managerial_changes WHERE Replaced by = Petrik Sander